Edelweiss Performance 9.2 Everdry Unicore is a versatile rope suitable for very demanding climbs for fairly experienced users. Certified as single, half and double rope, thanks to Everdry technology it is resistant to water and abrasion and therefore extends its life. In fact, when you have to keep the rope in very dusty terrain, Performance with Everdry treatment will absorb much less dust, therefore thickening less over time. We also find the Unicore treatment that combines the core and sock of the rope, giving it more safety even in mountaineering situations. This treatment also avoids the problem of the sock sliding once the rope begins to age. Instructions. Edelweiss Performance 9.2 mm Everdry Unicore climbing rope